Improvement in mitre-box



time tatnt Letters Patent No. 89,124, elatedl Apo-'il 20, 1869.

IMPROVEMENT IN MITRE-BOX The Schedule referred to in these LettersPatent and making part of the lame.

To all whom it may concern Be it known that we, ROBERT BURGHELL and ROB-ERT T. BURCHELL, of Trenton, in the county of Mercer, and State of NewJersey, have invented a new and improved Mitre-Box; and we do herebydeclare that the following is a full, clear, and exact descriptionthereof, which willenable others skilled in the art to make and use thesame, reference being had to the accompanying drawings, forming part ofthis specification, in which- Figure l is a perspective view of ourinvention.

Figure 2 is a plan view of the same.

Figure 34is a detail plan View, illustrating the manner of adjusting theguides to the scribed line.

Similar lettersof reference indicate like parts.

The object of this invention is to provide an irnprovd apparatus forguiding handsaws in the opel-af tion of mitring strips of wood, asmouldings and the like; and

It consists in the combination of parts, as will be hereinafter morefully described.

In the drawings- A is a rectangular frame, of metal, surrounding andholding the wood bottom, B, affixed therein by screws through the frame.

This frame A is provided with two parallel and slotted anches, C C,arranged one on each side of the frame, as shown.

It is also provided,'on one side, with two projecting plates, D, on aline with the slotted anch of that side.

These plates are formed with dovetailed slots, in which the dovetailedfeet E of the standards, or rests F G tit and slide, to adjust the saidstandards, with referenceto the other parts of the apparatus, whenrequired.

A middle standard, H, is also provided, and is attached to the Hauch Cby means of a screw-bolt, a, passing throughV its slotted foot I and theslot of the Hauch O. The screw-bolt is provided with a burr underneaththe ianch C, by means of which the said standard is clamped iirmly inplace. The ,slot in the foot I permits its adjustment to or from thewood, B, on which the moulding to be mitred rests.

This standard is particularly designed for such short pieces of mouldingas will not reach from one of the standards to the other.

The standards G are clamped in place by means of set-screws b, passingthrough the slots in the feet E, and working in hollow threads in theplates D.

The saw-guides on the same side with the standards are composed of thetwo general parts, J K L and M N.

The rst part consists of the guide-plate J, having its slotted foot Kclamped to the separate plate L by a clamp-screw, fl, passing throughthe slot, and working in the plate L. By means of the slotted foot, theplate J, is adjusted to or from the guide-plate M, to accommodate sawsof different thickness.

The plate L slides in a dovetailed slot in the footextension N of theguide-plate M, and'is clamped thereto by a clamp-screw, c. The plate Land its clamp-screw permit the adjustment of the edge of the guide-plateJ to the scribe-mark on the moulding to be mitred.A

From the bottom of the foot N, there projects a threaded stud, whichpasses through the slot'in the flanch G, and is provided with a nut, orburr, to clamp the foot to the flanch.

This stud is located under the guide-.plate M, is identical, in itsfunction, with the similar stud f and burr g of the guide-plates O P onthe opposite side of the frame A. These latter guides are onlyadjustable for the thickness of the saw, and alignment with thescribeline and opposite corresponding guides and the mitreangle.

The part Q is formed with a foot, R, sliding in a dovetailedy slot inthe foot P of the guide-plate O, as shown.

lz is the clamp-screw, operating as described, for the other guides.

Fig. 3 illustrates the manner of setting the edge of the guide-plate Jup to scribe-line n, whenthe angle of the mitre is such as prevents theface of lthe same from coinciding with the line t-i of the standards.

It will be observed from the foregoing that the mitringguides are adjustable- Y First, for dierent angles of the mitre -joint to be made.

line.

Third, to di'erent positions along in the slotted anches, and, inaddition thereto, the guides on the standard side are adjustable to thescribe-mark, as

shown in tig. 3.

The apparatus also comprises a set of guides for cutting o" the mouldingat any desired bevel or angle, or with a square end. These guides areshown at S S' S S', and are mounted on the squared ends of a rod passingthrough the frame A and its Wooden bed B, one pair of guides being aixedto the rod, while the other fits loosely on the other squared end, whichlatter terminates outside of the guide with a threaded end, on which aclamp-burr, or nut,I k, works. -The intermediate part of the rod iscircular, and its bearings are aiorded by the frame A, through which itpasses.

The guide-plates S are provided with slotted feet T, in the slots ofwhich the feet T of the guide-plates S slide.

Second, for the adjustment of the opposite guides to the properalignment with each other and the scribe l are clamp-screws, passingthrough slots in the feet The combination, in a mitringapparatus, of theT', and serve to clamp the guide-plates S to their guide-plates M N andJ K with the plate L and clampproper adjustment for the thickness of thesaw. screws d e, substantially as and for lthe purpose shown All theguide-plates are faced with wooden tablets, and described.

lm, to prevent injury to the saw. ROBERT BURGHELL.

The moulding is rested against the standards, and ROBERT T. BURCHELL.the operator stands on the opposite side of the apparatus. WitnessesHaving thus described our invention, CHARLES LAYTON,

We claim as new, and desire toy secure by Letters CHARLES FISH. Patent-

